Automatic valve mechanism for bumping-machines.



H. L. DEMMLBR.

AUTOMATIC VALVE MECHANISM FOR BUMPING MACHINES.

APPLICATION FILED AUG. 30, 1909.

1,942,09 L. Patented 0011.22, 1912;

satanic onnion.

f. HENRY L. DEIY'II II JEB, 0F KEVJANEE, ILLINOIS.

AUTOMATIC VALVE MEbHANlST-d FOE BUMPING-IYIACHINES.

Application filed August 35), 18 9.

To all aphom'it may concern:

Be ii known that I, HENRY L. DEMIMLER, a. citiz of the United States.residing at Kewanee; in the county of Henry and State of Illinois, haveinvented a new and useful Automatic Valve Mechanism for Bumping-Machiiies.

My invention has for its object to provide an improvement in bumpingmachines of the class used'in molding operations. for imparting a seriesof reciprocating strokes or impulses to the flask to pack the sandaround the pattern. The invention particularly refers to the fluidcontrolling valve mechanism for such machine or similar reciprocatingapparatus, and to the incorporated'structure, whereby a fluid pressureis utilized to impart an upward stroke to the bumpingor vibratingelement. and gravity is utilized for accomplishing the return ordownward stroke, in connection with positive lowering of the exhaustvalve by fluid pressure.

One form of the apparatus is illustrated in the accompanying drawings inwhich- Figure 1 is a vertical sectional view through .t.he valve and thesuperimposed bumping element, showing the parts in normal position. Fig.2 is a similar viewshowing the bumper raised. Fig. 3 is a horizontalsectional view. indicated by the line III. III. of 1. Fig. is a similarview on the line- IV. IV. of Fig. 1.

Mounted upon any suitable support as the base of the bumping; machine,not shown, is a main pedestal A comprising a. valve casing for the oprative fluid controlling valve mechanism. having at its upper portion anexteud d head M oi' reduced diameter extending above an annular abutmentor shoulder R, and having packing rings N.

Slidingly mounted on the pressure head M isthereciprocating head orbumper E, suitably'chan'ibcred in its interior to fit over the head Hand providing, when seated. on the annular abutment It, aspace F betweenthe upper end of the hchd M and the inner upper end of its cavity. Thedash is to be upon the top of bumper F.

Arranged centrally oi" base A and its head M is a primary valve chamberB having a valve seat 7) and a secondary or upper chamber D connected bya circulating port G Specification of Letters Patent.

Patented Oct. 22, 1912. Serial No. 515,255.

above valve seat 7). Constant fluid pressure is supplied to primarychamber B by a port. ll connected with any suitable source of pressure.

A piston Q is rcciprocably mounted in the lower portion of chamber andis provided with suitable packing rings N. Mounted.

in. the upper chamber 1) is a valve K adapted to seat on valve seat Gcontrolling circulation to the exhaust port L and provided lengthwise ofits exterior body portion with a series of fluid circulation grooves P.

A cushion spring 0 is located in the sccoudary chamber D, seated on thebottom thereof and bearing underneath the bottom of valve K. tending tohold it to its seat, as in Figs. 1 and Extending downwardly from exhaustvalve K is a central stem I to which is secured the piston Q by anysuitable means, as a pin 9. so as to positively lower the exhaust valveK from its seat by fluid pressure acting on the upper side of piston Q,when the bumper E is raised, as in Fig. 2.

For the purpose of controlling the flow of fluid pressure through port Cto chamber D and through groovesPto space F, to shut oii" the flow whenthe bumper is raised, and to open circulation through said ports when itis lowered, a valve J is slidingly mounted on stem I of the exhaustvalve K. Said valve provided with an upwardly extending sleeve j adaptedto be engaged by the bottom of exhaust valve K on downward travel of thebumper whereby to unseat valve J and allow of circulation being renewedthrough port C to again raise the bumper,

Spring 0 is of suflicient strength to hold exhaust valve K to its seatwhen the bumper raised to almost the limit of its travel, as in Fig. 2,and'to partly resist thedownward action of piston Q to allow said pistonto quickly unseat valve K, when the bumper is clear up, but not to lowerit suiliciently to strike the top oi sleeve j prematurely. This latteroperation is not intended to occur until, the fluid in space F havingexhausted through ports L, the bumper falls by gravity, pressing valve Kdown with it, and ans-eating valve J for the next lifting operation.

- It will be observed that the area of haust valve K is greater thanthat of piston exhaust valve, K, thereby slig tly The action of thedevice will he suddenly arrested in of valve J, tly beyond ening fin itsclear from the foregoing description. In its normal lowered position,exhaust port L is closed and valve J is depressed, opening pressurecirculation to s ace F, whereby the bum er is raised to the imit ofitsmovement. is action raises piston Q and likewise valve J, closing theport C as in Fig. 2. Thereupon ressure through ll acts on piston Q an byits connection with stem I, exhaust valve K isguickly and slightlylowered from its seat, against ressnre of s rin 0, allowing exhaust,wiiereupon the lien. E falls to its seat Q, but piston K being itsupward movement by seatin the head E tends to raise sli the exha andassisting the valve lowering. Lion.

0 on annular abutment R, closing, exhaust L 1 mary chamber,

on its way down by bringin seat G against valve K. This operation willcontinue alternately as ion as ressurc is admitted, and at a speeddependent on the pressure or amount of sup ly.

It will be understood that the proportions, arrangement and desi of thedevice may be changed-or varie by the skilled j chanic, and I do notdesire to be limited i the exact construction as shown and described butto include all such changes as within the scope of the following claims.

What I claim is:

1. In a reciprocatin device, a casing having a primary cham r and anauxiliary chamber, a valve-seated port connecting said chambers, asupply ort for said pnahead s idingly en ging rovided with a suita leexhaust port, ava ve in said prima chamber for controlling saidvalve-seat port, a ,valve in said auxiliary chamber for controlsaid'casing and ling said exhaust port, and fluid actuated means foroperating said valves.

2. In a reciproca 1 device, a casing hav ing a prima cham r aind anauxiliary chamber, a va ve-seated port'connecting said chambers! a suply port fipr said primary chamber, a hen slidingly eiiga 'ng said casingand provided with a. suitabe exhaust port, a valve in said primarychamber for controlling said valve-seate port, a valve in said auxiliarychamber for controlling said exhaust port, fluid actuated means foroperating 881d valves, and means for checking said exhaust valve on itsreturn stroke.

3. In a reciprocating device, acasing having a primary chamber and anauxiliary chamber,-a valve-seated port connecting saidchambers, a supplyport for said primary chamber, a vertically reciprocable head slidinglyengaging said casing and provided with a suitable exhaust port, a

valve in said primary chamber for control- 6 ling said valve-seatedport, a valve in said said slidingly enga provided witha reciprocablehead having. a. valve controlled exhaust port, a cerrtra ly arrangedvalve and piston chamber, a secauxiliary chamber for controlling saidoxhaust port, fluid ac uated means for operating said valves, and meansfor arrest' its downward travtfi.

4. In a reciprocatin device, a having a primary chamier and an aunlichamber, a valve-seated port connecting sai chambers, a supply port forsaid pnma chamber, a vertically reciprocable head sli ingly engagingsaid casing and provided with a suitable exhaust port, a valve in saidprimary chamber for controlling said valve-.

ing head at the limit 0 exhaust port respectively, substantially as iactforth.

6. .The combination with a stationary base provided with a reciprocablehead havin a valve controlled exhaust port,; of a va ve ccntrollin saidport adapted to reciprocate with said cad, a cushioning spring therefor,and valve and piswn' mechanism in st operable to admit pressure to saidhead and to open said exhaust port respectively, substantially as setforth.

7. The combination with a stati provided with a reciprocable head,"aving a valve controlled exhaust port, a'centrally ar-' ranged valve andpiston chamber, a secondany exhaus, valve chamber. and a communi--eating valv'e seated port; of an exhaust valve in said secondary chamberhavhg a downwardly extending stem, a piston secured thereto, and a valveslidingly mounted on said stem between the exhaust valve and piston andoperable to open and close said communicating port, substantially as setforth,

8. The combination with a stationary base ondary exhaust valve chamber,and a communicating valve seated port; of an exhaust valve in'saidsecondary chamber having a downwardly extending stem, a piston securedthereto, and a valve slidingly mounted on said stein between the exhaustvalve and piston having an extended sleeve adapted to contact with theexhaust valve,substantially as set forth.

9. The combination with a stationary base provided with a reciprocablehead having a i no nee-spec valve controlled exhaust port, a centrallyan ary exhaust valve chamber. and a communieating valve sealed port; ofan exhaust valve in said secondzii'y cl amber having a down wardlyextending'stem, a cushion spring therefor, a piston secured thereto, anda valve slidingly' m'ouhted on said stem between the exhaust valve andpiston and operable to open and close said communicatingport,substantially as set forth.

10. In a reciprocable bumping machine, the combination of a cylinder anda piston, a valve casing, an exhaust valve adapted to be locked insealed position by fluid pressure in said cylinder, an independent inletcontrolling valve, and means for controlling said inlet valve 11. In areciprocating device, a casing having a primary chir mber and anauxiliary chamber, a eontract d opening connecting said chambers, asupply port for said primary chan'iber, a head slidingly engaging saidcasing and provided with an exhaust port, a. valve insaid uxiliarychamber for cont-rollinq skid exhaust port, and fluid actuated means insaidlprimary chamber for actuating said exhaust valve.

12. In a reciprocating device, a casing having a primary chalnber and anauxiliary chamber, a supply pbrt for said primary chamber, a slidinglyengaging head for said auxiliary chamber, a :suitable exhaust port forsaid auxiliary chamber, an inlet valve in said prima y chamber, andmeans for ex haurting fluid pressure from said auxiliary chamber. I l

13. In a reciprocating device, a casing having a primary cha mbercommunicating with an auxiliary chal nbcr, a supply port for saidprimary chamber. a head slidingly engaging said casing. a suitablevalve-seated exhaust port t'or saidpumiliary chamber, a valve in saidam" iary chamber adapted to be sealed by lluid'prissurc insaid auxiliarychamber. and lluid aclil alcd means for sewaling said exhaust valvtal-14. In a recipl'ocatilngr device, :1 (using having a slidingly engaging:head, means for supplying tlui d pre sure lo said casing, a suitableexhaust purl for said casino. 1. valve in said casing for controllingsaid cxhaust port, and fluid actuated means l'or operating said exhaustvalve.

15. In a reciprmratin c device. a casino; having a slidingly{engaginghead. ineam: l'or supplying lluid pressiue to said casino, :1

in said 'asing for c nlrolling said exhaust port, lluid actuated meansfor actuating-aid exhaust valve, and m'elins l'or Hll])1)(lllll1,,l'

"said slidingrly engaging head at the lower terminal of its stroke. 1

lli. In a reciprocating device, a casing; having a shdingly engaginghead and provided pith a-suitable exhaust port, means for supplyingfluid pressure to said casing, a' valve in said casing for controllingsaid exhaust port, lluid actuated means for actuatine said exhaustvalve, and an anvilto 7 support said slidingly engaging head on itsreturn stroke.

17. In a reciprocating: device, a casing having a slidingly engaging;lead, means for supplying fluid pressure to said casmg, a suitableexhaust port in said casing, an exhaust valve adapted to be locked insealed position by fluid pressure, and means for l 1, 1 operating saidexhaust valve. i

18. in a reciprocating device, a casing 30 having a slidingly engaginghead, means "for supplying lluid pressure to said casing,

a suitable exhaust port for said casing, an exhaust valve adapted to belocked in sealed position by fluid pressure, means for operat- 35 ing,said exhaust valve, and means for suppfil'l'lllg said slidingly engaginghead at the terminal of its return stroke.

it). in a reciprocating device, a casing having a primary chan'ibercommunicating with an auxiliary chamber, a supply port for said primarychamber, a slidingly en; gaging head for said casing, a suitable ex-fghaust port for said auxiliary chamber, an, exhaust. valve adapted to belocked in sealed position by fluid pressure in said auxiliary chamber,and means for actuating said ex-- haust valve.

20. In a reciprmaling device, a casing having a primary chamber and allauxiliaryv chamber, a supply port for said primary rhambcr, a slidinglyengaging head for said auxiliary chamber, a. suitable exhaust port torsaid auxiliary chamber, an inlet controlling: valve in said primary;chamber, l05 means for exhausting lluid pressure from said auxiliarychamber, and meaus for supporling said slidingly engaging head at theterminal of its return stroke. l,

".t'flln a reciprocating device, a 'asing llll In, Inn :1 primarychamber and an auxiliary chamber. a supply port for said primarychamber.a slidiugrly engaging: head for said auxiliary chamber. a suitableexhaust port for said auxiliary chamber, an inlet conlrolline' valve insaid primary chainber. and fluid actuated means 'l'ui' exhausting lluidpressure from said auxiliary chamber.

M chamber. a slidingrly engaging head for said suitable exhaust purltolsaid casing, a valve for auxiliary chamber, a suitable exhaust port 1said auxiliary chamber, an inlet. conl trolling valve in said primarychamber, l'luid actuated means for exhausting fluid l pressure from saidauxiliary chamber, and means for supporting said slidingly engag leg:head at the terminal of itsreturn stroke. 1

23. in a reciprocating device, the combination of a cylinder and apiston, 11 valve nameto this specification in the presence of casing, anexhaust valveb adiapged to be two subscribing witnesses.

100 e in sealed position y ui pressure 4- in said cylinder, anindependent inlet con HENRY D i trolling valve and fluid actuated meansfor v Witnesses1 actuating said va1ves.- i LEONARD D. Qnnm,

In testimony whereof I have signed my Lns'mnJ. LOWE.

